Śatapatha Brāhmaṇa ("of a hundred paths") 7.4.2.28

7.4.2.28

viśvasmai prāṇāyāpānāya | vyānāyeti prāṇo vai viśvajyotiḥ sarvasmā u etasmai prāṇo viśvaṃ jyotiryaceti sarvaṃ jyotiryacetyetadagniṣṭe 'dhipatirityagnimevāsyā adhipatiṃ karoti sādayitvā sūdadohasādhivadati tasyokto bandhuḥ

'For all breathing, out-breathing, through-breathing,'--the all-light (brick) is breath, and breath is (necessary) for this entire universe;--'give all the light!' that is, 'give the whole light;'--'Agni is thine over-lord,' he thus makes Agni the over-lord of this earth. Having 'settled' it, he pronounces the Sûdadohas upon it: the significance of this has been explained.